My Roadster kept "stuttering" also and then it just quit running. They kept it for over two weeks and just couldn't figure out what was wrong. I asked about the transmission several times but they kept saying that the computer said it was something else. I don't even remember how many things they tried but finally they pulled the pan and found metal shavings in the transmission fluid. They put a new transmission in last October and it has been fine ever since. It was kind of ugly for a few weeks but I still just love that little girl!

Red Roadster, Slate Interior